> On 五月 12, 2016, 12:25 p.m., Guangya Liu wrote:
> > include/mesos/docker/v1.proto, lines 56-57
> > <https://reviews.apache.org/r/47198/diff/2/?file=1380544#file1380544line56>
> >
> >     Why both `optional`? I found that other `Label` definition are defining 
> > `key` as required but `value` as `optional` or `required`. I think that for 
> > your case, both `key` and `value` should be required?
> 
> Gilbert Song wrote:
>     The docker label should be independent from the label in our first class 
> proto. 
>     
>     Even though from docker documentation `Keys should start and end with an 
> alpha numeric character`. But I can still generate the followings by some 
> experiments using docker build:
>     ```
>                 "Labels": {
>                     "": "something",
>                     "com.example.release-date": "2015-02-12",
>                     "com.example.version": "0.0.1-beta",
>                     "com.example.version.is-beta": "",
>                     "com.example.version.is-production": "",
>                     "vendor": "ACME Incorporated"
>                 }```
>     
>     So that is the reason we want both optional. Actually `optional` should 
> be more safe even if you dont have the issue above.

I think that at least we need to have the `key` as required, otherwise, the 
label as `"": "something",` may have no meaning, how does a label without `key` 
works?


- Guangya


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On 五月 13, 2016, 8:48 p.m., Gilbert Song wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/47198/
> -----------------------------------------------------------
> 
> (Updated 五月 13, 2016, 8:48 p.m.)
> 
> 
> Review request for mesos, Benjamin Mahler, Artem Harutyunyan, Jie Yu, and 
> Kevin Klues.
> 
> 
> Bugs: MESOS-5272
>     https://issues.apache.org/jira/browse/MESOS-5272
> 
> 
> Repository: mesos
> 
> 
> Description
> -------
> 
> Added labels to docker v1 spec config.
> 
> 
> Diffs
> -----
> 
>   include/mesos/docker/v1.proto ff18f8cadfce3315467f194d50d3469fa839f686 
> 
> Diff: https://reviews.apache.org/r/47198/diff/
> 
> 
> Testing
> -------
> 
> make check
> 
> 
> Thanks,
> 
> Gilbert Song
> 
>

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